export {};

console.log("hello");

let a: number = 10;
console.log(a);

let str: string = "hello";
console.log(str);

console.log(typeof str);

let num = 100;
console.log(typeof num);

let arr: number[] = [1];
console.log(arr);
arr.push(12);
console.log(arr);

let person: { name: string; age: number } = { name: "张三", age: 10 };
console.log(person);
